Metal working machine



Jan., l2, X932. B, A BREST 1,840,657

METAL WORKING MACHINE Filed Aug. l2, 1930 2 Sheets-Sheet l il y@ I i l725/ I E E 39 l 32 l r I 56 s l /g 130|I 37 7 747 Z- W -Z 1 In/vanto@ Wff if m/MA. 5f/@Ji Jan.. l2, 1932. B. A. BRIEST METAL WORKING MACHINEFiled Aug. l2, 1930 2 Sheets-Sheet 2 Patented Jan. 12, 1932 UNITEDSTATES BRUNO A. BRIEST, OF TOLEDO, OHIO METAL WORKING MACHINEApplication led August 12, 1930. Serial No. 474,682.

This invention relates to the conversion of motion in one direction intomotion in a direction transversely thereto, more particularly in ahelical orbit.

This invention has utility when incorporated in plunger or pressoperation for trimming, piercing, shaving, notching or forming of metalor other material, such as drawn shells, an instance being the trimmingof a drawn sheet metal cup to a definite height by a continuousprogressive cutting.

Referring to the drawings:

Fig. 1 is a front View of a press having an embodiment of the therewith;a

Fig. 2 is a detail view of the opposing relatively movable members ofthepress of Fig. 1, the lower or stationary member being shown insection with the holder therein;

ig. 3 is a view in section of the members and holder at operationcompleting position, as distinguished from Fig. 2 disclosure of positionfor starting the press opera-tion;

Fig'. L1 is a View similar to Fig. 3 with the dies adapted for piercingor notching operations;

Fig. 5 is a section on the line V-V, Fig. 3;

Fig. 6 is a side elevation of the cup to be trimmed under the disclosurein Fig. 3;

Fig. 7 is a perspective view of the completed article from theoperations disclosed in Fig. 4;

Fig. 8 is a view of a sinuous cross-section thread or helical Way andits coacting holder;

Fig. 9 is a view of a V-cross-section thread or helical Way and itscoacting holder, parts being broken avvay; and

Fig. 10 is a diagrammatic view of the helical orbit of travel orrelative movement for the holder.

Press frame 1 may provide the medium for :in installation under thisinvention. Driving belt 2 may operate belt pulley 3 to rotate shaft. 4in the frame 1 carrying the pinion in mesh with gear 6. Treadle 7mounted in the frame 1 is etlioctive thru clutch device 8 to eiiect onerotation driving cycle connection of the shaft 9 with the gear 6.Connecting rods 10 from this crank shaft 9 operate erosshead 11 inguides 12 of the frame l,

invention incorporated toward and from the opposing table 13 in theframe 1.

Mounted on the table 13 is member 14 having central opening or pocket 15in the outer face or pocket wall of Which is helical Way 16 as a grooveor thread. This thread is coarse and in practice of a. depth to its rootfor the range of transverse shifting. This Way 16 is shown asterminating in a throat 17 concentric with the pocket 15 andapproximately half the root depth of the groove 16 larger than thepocket 15.

Located in the pocket 15 is holder 18 having peripherally thereof Waycoacting means or endless rib 19, determining a diameter Greater thanthe diameter of the pocket 15 by approximately the depth of the groove16. This holder 18 and its rib 19 thus center at the throat 17 over thepocket 15. The holder diameter approximates half the sum of the outsideand inside diameters of the Way 16. rlhe holder 18 may not remain c0-axial and move axially of the pocket 15, but with the rib 19 enteringthe Way 16 at one side the rib 19 may clear the inside of the pocket 15at the opposite side. This means that travel of the holder 18 into thepocket 15 is by transverse progressive shifting defining a helical orbitof the diameter of the depth of the Way 16 from the side Wall of thepocket 15. Center point 20 of the holder 18 thus startsfrom axis 21 ofthe pocket 15 as concentric of the Way 16, and moves 0H' center by pathsection 22 into helical path portion 23, usually free to rotate, althomay be keyed to or not to rotate.

The holder 18 is sustained against tilting in the pocket 15 by plate 24having depending pins 25 thrust upwardly by compression helical springs26, as the yielding means tending to locate the holder 18 for initialposition in the throat 17.

In order that in the recover travel, or under other circumstances theholder 18 may not become tilted. but still be free for its orbitaltravel, bolts 27 through the holder 18 engage collar 28 having clearancefor ridin under overhang 29 of the plate 24. This collar 28 is of lessdiameter than the pocket 15 and as it shifts eccentrically with theholder 18, holds the holder in position. The holder 18 is providedcentrally thereof with seat 30 herein shown as a removable litting forarticle of work 31. This article of work or cup 31 is shown as havingupstanding rim or flange 32 to be given definite trim or hei ht shearingoli at line 33 (Fig. 6).

(Ipposing the first or pocket member 14 is second member 34, as theplunger carried from the crosshead 11 of the press. The member 34 isshown as having depending guide 35 descending about the member 14 forholding the members for relative axial travel. Drop member 36 may beyieldably thrust into the cup of the work 31 as a cooperative guide,while pins 37 bear against the holder 18 to overcome the spring 26 andcause the holder 18 to descend in the pocket 15 in describing the orbit22, 23, in passing from the initial concentric position in the throat17. This second or movable member 34 also has a seat 38. In the instanceherein, such seat carries die 39 instead of work. For this trimmingoperation the die 39 as progressing radially from the central initialposition with the flange 31 between the member 36 and the upper edge ofthe seat 30, effects a shearing cut continuous in its progress duringthe relative movement between the Way 16 and the holder 18.

Importance attaches to accurate location of the work as closeness toprescribed dimension is sought. To this end the work height in the seat30 may be supported by inverted cap 40 having anti-friction thrustbearing 41, While grinding oli of pins 37 and die 39 may be to aselected gage. Bolts 43 permit replacement of the throat 17, while bybolts 44, substitute members 14 may be supplied for diferent eccentricpath radii, and dierent pockets, even conforming to a group of articleswhich may be of non-circular form. For the motion conversion, member 14may have rounded edge thread 45, while the 'holder 18 has coactingcurved rib 46 (Fig.

8). Again Jfor a flat side way 47 in the member 14, there may be theholder 18 with rib 48 of an extent and configuration for the orbittravel. Inasmuch as the rib of the holder 18 is endless and thus of ahorizontal extent when the instance is of relative vertical travel,there is ample clearance 49 at thev inner diameter portions of the ribto permit entrance of the rib into the helical way to compensate for thepitch of such way without tilting the holder 18.

The die 39 (Fig. 3) is shown as held to axial shifting, while the workin the holder 18 describes the eccentric orbit. In Fig. 4 art i c le ofwork 50 is held axially and the holder 18 is effective for shifting dies51, 52 for effecting piercing operation 53 and notching operation 54.

After the descent of the plunger and the performance of the workingoperation in such stroke, the plunger recovers with the plate 24following to relocate the holder 18 in the throat 17 at the initialposition. With the plunger lifting the member 34 clear,

trimming 55 together with the article of work 31 as now completed may beremoved. A succeeding article is placed in the seat, and the treadle 7depressed for a repetition of the cycle of operations.

It is thus seen that in carrying out the motion conversion hereunder, ifthe holder has a helical thread or rib, the coacting member should havecoacting means or way controlled for relative movement against tiltingin the relative movement axially regardless of which undergoes theactual translation. The disclosure for die operations, herein shown asvertical instead of horizontal, permits accurate and economical quantityoutput for the mechanism is simple, readily adaptable to a wide rangeand possible of installation in standard machine tools. Furthermore themachine attendant need not be skilled.

It is to be seen that the range of radial throw or eccentricity need beonly just a little more than the gage or thickness of the work to be cutwhen such work be circular at the region of cut, whether there be butone article of work and that axially located, or whether there beseveral articles of such work disposed eccentrically, or one central andothers therea'bout eccentrically. lVhen the work is non-circular, saypolygonal or oblong, and there is to be trimming about the entirearticle, the radial range or eccentricity should be for the articlethickness beyond the difference in the extremes of the region to betrimmed or acted upon, especially in the event the trimming die becircular in such work and acting to cut outwardly.

VWhat is claimed and it is desired to secure by Letters Patent is:

1. The method of effecting die member operation as to work holdingmember from a single direction source of applied power comprising givinga straight line direction of movement to one member and thereby drivingthe other member as responsive to said movement for arc line of traveltransversely of said movement and causing said responsive driving tooccur progressivelyy 2. The method of effecting die member operation asto work holding member from a single direction source of applied powercomprising giving a straight line direction of movement to one member,yieldably resisting said movement, and guiding the other member forhelical travel in an arc as responsive to the movement and held by theresistance.

3. The method of effecting die member operation as to work holdingmember from a single direction source of applied power comprisingcausing one member to travel in a helical continuous arc orbit anddirecting the other member axially of said orbit.

4. A press embodying a member provided with a helical Way, a holderhaving a seat and provided with a rib for coacting with said Way, and asecond member having a seat radially fixed as to the Way, one of saidseats being for Work and the other for a die, said Way coacting withsaid rib for radially shifting the holder upon relative axial movementof said members.

5. A press embodying a member provided with a helical Way, a holderhaving a seat and provided with a rib for coacting with said Way, asecond member having a seat radially fixed as to the Way, one of saidseats being for Work and the other for a die, and an actuator foreffect-ing relative movement of one member as to the other axially ofthe Way for effecting radial shifting of the holder.

6. A press embodying a first member provided with a helical Way, aholder having a seat and provided with a rib for coacting with said Way,a second member having a seat radially fixed as to the Way, one of saidseat-s being for Work and the other for a die, yieldable means locatingthe holder at an initial position along the Way, and an actuatoropposing the yieldable means in effecting relative progress of theholder along the Way from said initial position.

7. A press embodying a first member provided With a helical way having aroot diameter, a holder having a seat and provided with a rib forcoacting with said Way, the outside diameter of said holderapproximating a mean of' the outside and inside diameters of said Way, asecond member having a seat radially fixed as to the Way, one of saidseats being for work and the other for a die, yieldable means locatingthe holder at an initial position along the Way, and an actuatoropposing the yieldable means in effecting relative progress of theholder along the Way :from said initial position.

S. A press embodying a first member provided with a helical way having aroot diameter terminating in a throat approximating a mean of theoutside and inside diameters of said Way, a holder to becentered at saidthroat, said holder having a seat and provided With means for coactingwith said way, a second member having a seat radially fixed as to theWay, one of said seats being for work and the other for a die, and anactuator for ctl'ecting relative progress of the holder along the wayfrom said throat by shifting one ot said members as to the other axiallyof said Way.

9. A press embodying a first member having a pocket, a helically groovedWay along the. inside of said pocket having a diameter larger' than thepocket diameter, a holder having a seat and provided with an endless ribof approximately mean diameter between that of the grooved Way and thepocket, and a second member having a seat radially fixed as to the way,one of said seats being for Work and the other for a die, said Waycoacting With said rib for radially shifting the holder upon relativemovement of the members axiall)7 of the Way.

l0. A press embodying a first member having a pocket, a helicallygrooved Way along the inside of said pocket having a diameter largerthan the pocket diameter and terminating in a throat of approximatelymean diameter between that of the grooved Way and the pocket andconcentric of the pocket, a holder of the diameter of said throat, saidholder having a seat and provided with means for coacting with said Way,a second member having a seat radially fixed as to the Way, one of saidseats being for work and the other for a die, yieldable means forinitially locating the holder in said throat, and an actuator foreffecting relative movement of the members axially of the `Way inprogressing the holder from said throat.

In Witness whereof I afiix my si nature. BRUNO A. B IEST.

